Quantum discord and non-Markovianity of quantum dynamics

S. Alipour*, A. Mani, A. T. Rezakhani

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)

Abstract

The problem of recognizing (non-)Markovianity of a quantum dynamics is revisited through analyzing quantum correlations. We argue that instantaneouslyvanishing quantum discord provides a necessary and sufficient condition for Markovianity of a quantum map. This is used to introduce a measure of non-Markovianity. This measure, however, requires demanding knowledge about the system and the environment. By using a quantum correlation monogamy property and an ancillary system, we propose a simplified measure with fewer requirements. Non-Markovianity is thereby decided by quantum state tomography of the system and the ancilla.

Original languageEnglish
Article number052108
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number5
DOIs
Publication statusPublished - 10 May 2012
MoE publication typeA1 Journal article-refereed

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